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AQA Environmental Science A-Level: The Atmosphere 2024 Exam Questions and Answers
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AQA Environmental Science A-Level: The Atmosphere 2024 Exam Questions and Answers
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AQA Environmental Science A-Level:The Atmosphere 2024
Exam Questions and Answers
What are the 4 layers of the atmosphere (Earth to sky)? -
Answer>> Troposphere, Stratosphere, Mesophere,
Thermosphere
What are the inner and outer cores mate from? - Answer>>
Inner core: Solid iron and Nickle.
Outer core: Liquid iron and Nickle.
How does the atmosphere support life? Give 6 ways. -
Answer>> > Gases for natural processes: The atmosphere
contains N2, O2, CO2 and H2O which are needed to make the
biological molecules used by living organisms.
> Absorption of electromagnetic radiation from the sun
> Delaying the escape of infrared energy
> Heat distribution
> Ocean currents: Winds blowing over the oceans create currents
that distribute heat by carrying warm water from tropical areas to
higher latitudes, such as the North Atlantic Conveyor.
> Transport of water vapour : Winds transport water vapour to
areas that would otherwise get little or no perception.
What are the 4 layers of the Earth from the centre to the edge? -
Answer>> Inner core, Outer core, Mantle, Crust
How does ozone form and how does it get broken down. Give
equations. - Answer>> UV radiation splits some oxygen
molecules into oxygen atoms (O2->O+O). An oxygen atom can
, then combine with an O2 molecule to form ozone (O2+O->O3).
Ozone can be broken down by UV radiation (O3->O2+O).
What percentage of the atmosphere is nitrogen? What increases
and decreases it and where is it used? - Answer>> 78%,
increased by denitrification (conversion of soil nitrates to
nitrogen), decreased by nitrogen fixation (conversion of nitrogen
to ammonia). Used to keep food fresh.
What percentage of the atmosphere is oxygen? What increases
and decreases it and where is it used? - Answer>> 21%,
increased by photosynthesis, decreased by aerobic respiration.
Used in breathing gases in healthcare.
What percentage of the atmosphere is Carbon Dioxide? What
increases and decreases it and where is it used? - Answer>>
0.04%, increased by aerobic respiration, decreased by
photosynthesis. Used in fire extinguishers.
What percentage of the atmosphere is Water Vapour? What
increases and decreases it and where is it used? - Answer>> 0-
4%, increased by evaporation, decreased by condensation. Used
in steam turbines.
What percentage of the atmosphere is methane? What increases
it? - Answer>> 0.00017%, increased by anaerobic respiration
by bacteria.
What's a dynamic equilibrium? - Answer>> A combination of
active processes that cancel each other's effects so that there is
no overall change.
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